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pp. 133–145
In recent years, people have bred freshwater pearls as a substitute for natural pearls that occur in seawater, and they have also developed water‐soluble pearl powder (P‐w) and ultra‐micro (P‐μ) and ultra‐nano pearl powder (P‐n) products. However, neither the scientific value of pearl powder, nor the differences in efficiencies of different pearl powder products is still unknown. In this...
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